I have an idea for a simple device that will allow a smartphone to create 3D content for viewing with cardboard. The concept is illustrated below. It is an image splitter for use with the smartphone video camera. Small mirrors are used to provide a split image to the smartphone video camera. Where might I be able to purchase simple mirrors (especially the right-angle splitter opposite the camera lens)? With a few simple mirrors, a short stick, and a mount for the smartphone we could begin creating our own 3D content for viewing with Cardboard.

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Leland Beaumont: Thanks for this. What is a Car boot sale?

Mike Birtwistle: People fill the back of their car (the 'boot') with second hand stuff they want to sell and drive to a large venue or field where regular 'car boot sales' are organised, usually on a weekly basis during summer.

Massimo Ricciuti: +Mike Birtwistleinteresting, but prisms are probably more expensive than mirrors, on a mass production scale plan, for a single private hack maybe, but however if you see the results that poppy3d gests, i see no refraction of colors as you righly pointed out